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Coal Bed Methane RTU (CBMR)

Last changed May 23, 2007 - 10:00am

Overview

Automation and Electronics, Inc. Coal Bed Methane (CBM) RTUInside ViewAutomation and Electronics' Coal Bed Methane RTU (CBMR) is designed to monitor and control the production of a Coal Bed Methane Well, and measure the gas and water production of the well.

This RTU is designed around the SCADAPack LP® controller running RealFLO® Gas Flow software, and is packaged with a Control Microsystems Model 4102 Multi-variable Gas Flow Meter, and a Cutler Hammer Variable Frequency Drive. Automation & Electronics has combined the latest Commercial-Off-The-Shelf (COTS) hardware from vendors with years of oilfield experience to provide the customer with a reliable, easily serviceable CBM RTU.

The SCADAPack LP communicates to the VFD and 4102 flow meter via RS-485 high speed serial communication, to gather gas flow data, and monitor and control the VFD. Water production is measured with a standard Turbine Meter, and fed to the RTU for totalization.

Radio communication to a central host computer is typically via a 900 MHz Spread Spectrum Radio network. Any RS-232 data radio can be integrated into this RTU. The unit is powered by an industrially rated 110 VAC / 12 VDC battery backed power supply.

Features

Hardware
  • Low power SCADAPack LP controller
  • Local operator interface
  • Electronic submersible or progressive cavity control
  • Fluid level sensor inputs
  • Automatic restart
  • Battery backed power supply
Alarms w/User Controlled Set Points and Timers
  • High/Low torque
  • Low speed
  • High/Low motor current
  • High/Low DC bus voltage
  • High casing pressure
  • Low fluid level


Shutdowns
  • High/Low torque
  • Low speed
  • High/Low motor current
  • High/Low DC bus voltage
  • High casing pressure
  • Low fluid level
  • Loss of VFD to SCADAPack LP communication
  • Loss of phase
Automatic Restarts
  • Low torque
  • Low speed
  • High/Low motor current
  • High/Low DC bus voltage
  • High casing pressure restarts when low casing pressure is reached
  • Low fluid level restarts when fluid is above low fluid set point
  • Loss of VFD to SCADAPack LP communication
  • Loss of phase restarts when power is good


Displayed Values
  • Speed
  • Torque
  • Motor current
  • Fluid Level (requires level sensors)
  • Specific gravity (requires two level sensors)
  • RealFlo calculated values and MVT read values
    1. Static (Casing) pressure
    2. Differential pressure
    3. Gas temperature
    4. Instantaneous gas flow
    5. Past day gas flow
    6. RealFlo running status and version number
  • Current water flow rate
  • Past day water flow
  • Last, 2nd last, and 3rd last fault
  • Current drive/alarm status
  • Current RTU time
Displayed User Control Parameters
  • Alarms set points and timers
  • Manual and automatic control set points
  • Automatic PID tuning control
  • Shieve ratio
  • Turbine meter (pulses per gallon)
  • Alarm and drive reset
  • User initiated shutdown
  • Optional level sensor parameters
  • Electronic submersible or progressive cavity control


Specifications

Mechanical
Housing: 18" x 16" x 8" NEMA 4X Enclosure
Environmental
Operating temperature: -40 to 158 deg. F (-40 to 70 deg. C)
Relative humidity: 5 to 90% non-condensing
Power supply 110 VAC / 12 VDC battery backed supply
Processor SCADAPack LP

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